[Form 4] Builders FirstSource, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Builders FirstSource director James O'Leary acquired 270 shares of BLDR common stock on 09/01/2025 at a reported price of $138.68 per share as payment in lieu of cash under the company's 2014 Incentive Plan and Amended and Restated Director Compensation Policy. After the transaction Mr. O'Leary is reported to beneficially own 87,489 shares, held directly. The Form 4 was signed by power of attorney on 09/03/2025. The filing discloses a routine compensation-related share issuance to a director rather than an open-market purchase or sale.

Positive

• Director alignment: Acquisition was made as compensation, increasing the director's direct ownership to 87,489 shares.
• Routine disclosure: Transaction clearly reported on Form 4 with transaction date (09/01/2025) and filing signature (09/03/2025), supporting transparency.

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: A routine director compensation share issuance, aligning director pay with shareholder interests; no unusual governance flags.

The Form 4 reports a non‑derivative acquisition of 270 shares granted to Director James O'Leary as compensation under the issuer's director compensation policy and incentive plan. This is customary practice to conserve cash and align directors with shareholder outcomes. The filing shows direct beneficial ownership of 87,489 shares after the grant. There is no indication of atypical timing, related-party transfers, or amendments that would raise governance concerns.

Securities Analyst

TL;DR: Small, routine issuance for director compensation; immaterial to overall share count and not a market-moving transaction.

The transaction (270 shares at $138.68) is explicitly described as issuance in lieu of cash compensation. The price reported likely reflects the grant valuation or market price but the Form 4 does not show an open‑market trade. Given the reported post‑transaction direct ownership of 87,489 shares, this incremental issuance is unlikely to materially affect capitalization or signal agenda changes. No derivative transactions or dispositions are reported.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

OLEARY JAMES

(Last) (First) (Middle)

C/O BUILDERS FIRSTSOURCE, INC.

6031 CONNECTION DR., STE. 400

(Street)

IRVING TX 75039

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Builders FirstSource, Inc. [ BLDR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
09/01/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.01 per share	09/01/2025		A(1)		270	A	$138.68	87,489	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Reflects acquisition of shares in lieu of cash compensation for services as a director under the Corporation's 2014 Incentive Plan pursuant to the Corporation's Amended and Restated Director Compensation Policy.

	/s/ Minator Azemi, by power of attorney	09/03/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did James O'Leary report on his Form 4 for BLDR?

He reported acquiring 270 shares of Builders FirstSource (BLDR) common stock on 09/01/2025 as compensation under the company's director compensation plan.

At what price were the shares acquired per the Form 4?

The Form 4 lists a reported price of $138.68 per share for the 270 shares acquired.

How many BLDR shares does James O'Leary beneficially own after the transaction?

The filing reports Mr. O'Leary beneficially owns 87,489 shares following the transaction, held directly.

Was the acquisition a market purchase or compensation?

The Form 4 states the shares were acquired in lieu of cash compensation under the 2014 Incentive Plan and the Amended and Restated Director Compensation Policy.

When was the Form 4 signed and by whom?

The Form 4 was signed on 09/03/2025 by Minator Azemi by power of attorney for the reporting person.